Multiple switch



Sept. Z, 19245 1,506,969

H. 1 BRADLEY MULTIPLE SWITCH Filed Juno 6. 1919 2 shuts-nut 1 EGJ. EG. 2.

5o Dlsulatian ATTO PNEY H. BRADLEY IULTIPLE SWITCH Filed Juno 6, 1919 2 Shasta-nui 2 FIG 7 specification.

Patented Sept. 2, 1.924.

UNITED STATES PATENT OFFICE.

HARRY L. BRADLEY, or MILWAUKEE, wisconsin'.

KULTIPLE SWITCH.

Application led June 8,

Switches, of which the following isa description, reference bein had to the accompanyingdrawings, whic are a part of this i The invention relates to switches and more particularly to that type of electricalprovide a switch arm carrying'spaced apart movable contacts which are successively brought into engagement, with cooperative fixed contacts and to impart a rolling movement to said movable contacts as they engage the adjacent fixed contacts so as to minimize wear and -deterioration of the contact surfaces. f

A further object of the invention is to provide a switch arm carrying spaced apart movable contacts in which a single Ispring acts to permit yielding movement of both of said contacts.

A further obj ect of the invention is to provide novel means for mounting the switch arm upon the operating shaft.

A further object of the invention is to provide a switch in which movable contacts mounted on a switch arm are, successively broughtinto engagement with cooperative lixed contacts and thereafter one set of centacts is disengaged during a further move'- ment of the switch arm in the same direction.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion-hereof.

In the drawings: Fig. 1 is a front elevation view ofthe switch embodying the invention; Fig. 2 is line 3-3of Fig. 2; Fig. 4 is a section taken on the lin'4-4 of Fi 2; Fig. 5 is a detail view of a vportion of t e switch arm; Fig. 6

1919. serial no. scam.

is a side elevation of the switch in anotherA operative position, parts being broken away and parts being shown in section; Fig. 7 is a view similar to Fig. 6, showing another position of the switch; Figs. 8, 9, 10 and 11 are diagrammatic views showing the switch in different positions. v

The base 6 of insulating material has contact supports 7 and 8 secured thereto by screw bolts 6 and xed contacts 9 and lO are respectively secured to said supports.

Journal brackets 11 are secured to the base 6 in spaced relation and have sleeves 12 journalled therein. A square operating shaft 13 passes' through the sleeves 12 and has insulating discs 15 and a square sleeve of insulating material 16 mounted thereon, said discs and sleevebeing provided with apertures shaped to conform to the shape of the shaft so as to turn therewith.

A part 17 of the contact carrying arm is provided with'lugs 18 near one end thereof, which have notches 19 therein to engage one of the square corners of the sleeves 16 and to which they are clamped by a clip 20, having threaded ends 21 17 and carrying by the part 17 will be tightly clamped to the square sleeve 16 and will consequently turn assing through the part dlamping nuts 22, wherewith the operating shaft 13. By using the sleeves 12 it is not necessary to provide a .specially turned shaft as the square shaft such as 13 is inserted in these sleeves, which sleeves then form a bearing part for the shaft to permit its being turned in the brackets 11. Furthermore, the squared shape of the shaft does away with the necessity of keying the switch arm or other parts to the shaft and permits the use of a simple clamping means such as'that previously descn'bed, so that from a manufacturing point of view the use of the square shaft and the connections above described is important @and of advantage in that it results in saving of labor and material, both in the making of the parts and their assembly.

`The outer end of the part 17 is provided with ears 23 and a part 24 of the switch arm is pivotally secured to said ears by s pin 25. This part 24 is in the form of a U- shaped member and secured to the transverse portion thereof by a bolt 26 is a movable 'contact 27 which cooperates with the fixed contact 9. A stop pin 28, and which under some instances may be a contact member, is secured to the sides of the U-shaped member between the contac-t 27 and the pivot pin 25. A fixed stop pin 29 is secured to the base and' cooperates with vthe stop pin 28 either as a stop member or under some conditions, as hereinafter described, asa contact member.

The part 24 is pivotally secured intermediate its ends by the pin to the part 17 and the lower end 30 thereof carries a pivot bolt 31 which is out of line with the pivot bolt 25 and mounted on this bolt between the arms of the part 24 is a bushing 32 and. washers 33. A contact carrying yoke 34 is journalled on the bushing 32. Thls yoke is made from a single piece of metal having inwardly flanged p ivot openings 35 stamped -therein and having a transverse portion 36. to which a movable contact 37 is secured by a bolt 38', saidcontact 37 cooperating with the fixed contact 10. The sldes of the member 34 are bent inw-ardly at one end 38 and secured together with a rivet 39, said end 38 normally engaging the pin 25.

The sides of the member 34 have hooked portions 40 and a rod 41 has aT head 42 1n which the laterally projecting portions vconductor plates 57 on their outer with the curved/ surfaces of the hooks 4(1)', said' rod passing through a slot 44 in the part 17 and carrying a spring 45 interposed between caps 46 and 47 mounted on the rod.

A pin 48 passes through the rod near thev end thereof vto secure the caps 46 and 47 and spring 45 in position thereon. The point of connection of the rod 41 with the member 34 lies between the pivot bolt 31 and the end 38 so that the spring 45 normally acts to maintain the end 38 in engagement-with the pin 25 and thus both levers 24 and 34 normally act as a unit.

' A circuit connection is made from the base 6 to the movable switch arm by means of a flexible conductor 49 securedto a post 50 on the base and secured by a clip 51 to the bolt 31 passin through the part 24 of themovable switc arm.

v In connection with the contacts 27 and 9 there is shown a magneticblowout for the arc with an arc chute but asl this does not constitute a part of the preseit invention it will only be briefly referred to here as-l consisting of a magnetic coil 52, plates 53 of fireproof material forming a chute, said plates being secured together by a pivot pin 54, stoppin 5 5 and a pin v56,-and carrying sides which cooperate with the pins 54 and 56 to form the magnetic circuit adjacent the'contacts 27 and 9. The chute, being pivoted on 4 the pin 54, may be swung back so that the stop 55 will not interfere withnthe forward Y movement of the contact 27 in case it is desired move this contact down a considerable distance. Normally, the stop 55 co- Lacasse operates with the contact 27 to allow only a limited movement for separation of said contact with the fixed contact 9.

Normally the spring 45, which is under a slight compression, exerts an outward pull on the rod 41 which brings the end 38 up against the pin 25 and brings a part-58 of the end 30 of the switch arm into engage? ment with the armpart 17 so that said parts are all connected together to move as a unit, but which provides for a movement .of the part 24 about the pivot 25 against the action of the spring 45 and a movement of the part 34 about the pivot 31- against the action of said spring.

The first movement of the shaft 13. to A swing the .'free end of the switch arm toof the operatingv shaft in the same direction causes the contact, 27 to act as ak fulcrum about the contact 9, and the lever 24 swings about its pivot pin 25 so that the end 30 vwards the base 6 moves the parts 17, 24 and Y y tion shown in Fig. 2. A further movement thereof have curved surfaces-43 contacting swings away from the `lever 17 against Athe v action of the spring while Ithe end 38 of the lever^34 is still in contact with the pin 25 and'this produces' a rolling action of the contact 27 on the contact 9 and brings the contact 37 into engagement with the contact 10. Thereafter a further movement in the same direction causes the lever 34 to swing about the bushing 32t6 move theV end 38 away from engagement with the pin 25 against the action of the spring 45 due to the ulcruming of the` contact 37 on thecontact 10, the partsl moving to the position shown in full lines in Fig. 6, and this swinging action produces a rolling action between vthe contacts 37 and 10. Thus successive contact is made between the contacts 27'and 9 and then between the contacts 37 and 10 and it `will .be noted that the contact 37 is at f some distance from the .contact 10 at the of the contact 37 i wear, there is no danger of the two sets of contacts being made at the same time.

In some instances it is desirable to lopen the first set of contacts, 27 and 9, while the second set of contacts, 37 and 10, are still ther movement of the engaged, and this is accomplished by a furo eratin shaft in the same direction as beibre, w ereby the parts are moved from the position shown 1n Fig. 6 to that shown in Fig. 7. This fur- 'ther movement brings the stop 28 into engagement with the stop 29 which causes the outer end of thelever 24 to swing outwardly to-move the `contact 27 out of engagement with the contact 9 while `the contacts 37 and 10 are still in engagement with each other. The `parts 28 and 29 may simply be employed as co-acting stops to accomplish this separation of the rst set of contacts, but,

if desired, a conductor may-be connected Vto the stop29, in which instance these vparts would serve as a third set of contacts which are brought into en agement with each other after the secon set of contacts are moved to 'operative position.

A return of the switch arm to inoperative l' position causes the sets of contacts to be hinged and 31 are of `ity so that current through thesets of contactspreviously described.

mounted intermediate its It is to be understood that this invention is not limited to any specific form or arrangement of' parts except in so far as such limitations are specified in the claims.

What I claim is new and desire to secure by Letters Patent is:

1. In a switch,`the combination of a pair of contacts, member, pivoted switch arms operatively connected to said member and provided with contacts, and apair of contacts engagedl by said switch arms, the contact on one switch arm engaging one of said first named contacts and rolling 'thereon to bring the contact on 'the other switch arm into engagement with the'other first named contact.

2. In a switch, theQcombination of a movable member, pivoted switch arms operatively connected to said member to ,move therewith and with respect thereto, a pair of cotacts engaged by said switch arms, one switch arm eng 'ng one of said contacts and rolling thereon to bring the' other arm s 1nto engagement with the other contact, and

means engaging one arm tofdisen ge it from its cooperative cbntact while the other i arm remains 4engaged with` its cooperative i contact.

3. Ina* switch, the combinati@ of contacts, aiv movable switch arm ing a movable member and a lever of a pair `pvflprlls'f. Plv y ends on saidpinillema movable switch-arm-carrying with the contacts with engagement while the first set of contacts are in loperative position.

4. In a switch, the combination of a movable switch arm comprising a movable member, a lever pivotally mounted intermedi` ate 'its ends on said member, acontact carried by said lever, a second lever pivotally mounted on said first lever, a contact carried by said second lever, and means nory mally preventing movement of said levers with respect to said member, contacts respectively cooperating with the contacts on said levers, the movement of said member vtrst bringing the contact on the first lever into engagement with the cooperative contact and thereafter moving both levers to bring the second contact into engagement` `with its cooperative contact.

' 5. In a `switch, the combination of a movable switch arm comprising a movable member, a lever pivotally mounted intermediate its ends on said member, a contact carried Jby said lever, a second lever pivotally mount.' ed on said first lever, a contact carried by said second lever, sprin means normally preventing movement of evers with respectx A to said member, and contacts respectively successively cooperating with the contacts on said levers.

6. In a switch, the combination of a pair of contacts, a movable switch arm carrying contacts coacting with said first named contacts, said switch arm comprising a'. plurality of parts relatively movable with respect to each other to successivelyI bring the contacts on' said arm into engagement which they cooperate, and means distinct from said contacts, engaging said arm to move one of said parts to-disengage the iirstset of contacts after thesecond seiare engaged. Y

7;- In a', switch, the combination of a pair.V of contacts, a movable-switch arm comprising a movable member, a. lever ivotally mounted 'thereon,"a` contact earriedpby said lever, a second lever pivotally mounted on said first lever, .a contact carried byy said second lever, and means normally prevent- .ing movement ofsaid levers withrespect to' said member and with'frespect to each other, cont-acts respectively cooperating with the contacts on said levers, and means engaging one. of said levers to disengageone set v01E contacts after the other set gaged. v

has' been en- 8'. a switch, the com ination of a movi `able'switch arm comprising `a movable mem- -ber, a lever pivotall contact carried by sa'd lever, a second lever pivotally mounted on said first lever, a contact carried by said second lever, and a spring for 'normally preventing movement of said levers with respect to said member and with respect to each other, and contacts respectively successively cooperating with the contacts on said levers.

9. In a switch, the combination of a movl able switch arm comprising a movable memcontacts on said levers, a second contact on l engaglable with said pin, sai

switc saidl second contact.

ber, a lever pivotally mounted thereon, a

.contact carried by said lever, a second lever pivotally mounted on said first lever, ad contact lcarried by said second lever, and' a,

spring for normally preventing movement of said levers withrespect to said member and with respect to each other, contacts respectively successively cooperating withV the cont-acts on said levers, a stop on one o'f said levers, anda fixed/.stop enga ing said stop fto disengage the contact carrled by this lever from its cooperative contact while the contact. on the other lever isengaged by its cooperative contact.

10. In a switch, the movable switch arm. comprising a movable member, a` lever pivotally mounted thereon i ver pivotally mounted on said iirst lever, a

contact carried by said second lver, and means for normally preventing movement of said levers with respect to said member and with respect to each bther, contacts respectively successively cooperating with the contacts on said levers, a second contact on tone of said levers, a contact engaging said second contact to disengage the other contact carried by this lever from its cooperativel contact while the contact on the other lever is engaged by itscoo erative contact.

12. In a switch, 4the com ination of a movablegmember, a switch arm, a pin pivotall connecting. said arm intermedlate its en s to said member, a switch arm pivoted to said rst named arm and having a art normally s first named armhavmg a part normally abutting said member, a spring, and means o eratively connectmg. sa1 d spring to sai 'second mounted thereon, a

combination of a named. switch arm to maintain said normal position.

13.` In a switch, the combination of a movable switch arm comprising a movable member, a contact carrying lever pivotally mounted on said movable member, and a contact carrying lever pivoted with respect to said first named lever, and contacts engaged `in' succession respectively by the contacts on said levers on a unidirectional movement o'said movable member.

14. In a switch, the combination of a movable member, a switch arm pivotally supported intermediate its ends -upon said memer, a switch arm pivotally supported inter.- mediate one end of said first named switch opposite ends of said arms. j

15. In a switch, the `combination of a movable member, a switch arm pivotally supported intermediate its ends upon said member, a switch arm pivotally supported intermediate its ends upon said first named switch arm, and means for limiting the movement of said second switch arm.

16. In a switch, the combinationY of amovable member, a switch arm pivotally suported intermediate its ends upon said memer, a switch a'rm pivotally supported intermediate its ends u on a pivot below and out of line with the pivot for the irstswitch arm, means permittlng both arms to move as a unit with and relatively` to said movable member, and contacts t carried at opposite ends of said arms. 17. In a switch, the combination, with spaced contacts, of a movable member, and a pair of inflexible` contact-carrying switch arms operatively connected thereto to swing Irelatively to each other and to said member to successively bring their contacts into circuit closing -relation with the cooperative contacts on a unidirectional movement of said movable member.

18. In a switch, the combination of a movable member a switch arm pivotally suported intermediate its ends uponsaidmemparts in Aarm and its pivot, and contacts carried at` Y r, a switch arm pivotally supported on one side of the pivotal connection between-said -irst named-switch arm and said member and carrying a' contact, means for normally preventing movement of'said arms with respect to said member and with respect to each other, and a contact on said first vnamed switch arm on the opposite side of its pivotal connection with sald member. l 19. In a switch, the combination of a movable switch arm comprising a movable member, a lever pivotal y mounted thereon, a contact carried by said lever, a second lever plvotally mounted on said first lever, a contact carried by saidsecond lever, and a. sprlng for normally preventing movement of said levers with re ect to said member and with respect to eac other, contacts relao' Bpectively successively cooperating with the contacts on said levers, a. stop on one of said levers, and a. member engageable with Said stop.

20. In a switch, the combination of movable switch arm comprising a movable member, a lever pivotally mounted thereon, a contact carried by said lever, a second lever pivotally mounted on said first lever, a contact carried b said second lever, and means for norma y preventing movement of said levers with respect to said member and with respect to each other, contacts respectively successively cooperating with the contacts on said levers, a stop on one of said levers, and a member engagmg said' stop to disengage the contact carrled by this lever from its cooperative contact While the contact on the other lever is engaged by its cooperative contact.

In testimony Whereof, I aix my signature, in presence of two Witnesses.

lHARRY L. BRADLEY. Witnesses:

EDWIN A. KAUMHIBIMER, ANNA CYsz. 

